travis: bumped the NGINX core to 1.27.0.

Author: jiahao

.travis.yml

@@ -44,22 +44,20 @@ env:
     - TEST_NGINX_SLEEP=0.006
   matrix:
     #- NGINX_VERSION=1.21.4 OPENSSL_VER=1.1.12
-    - NGINX_VERSION=1.25.3 OPENSSL_VER=1.1.1w
-    - NGINX_VERSION=1.25.3 OPENSSL_VER=1.1.1w USE_PCRE2=Y
+    - NGINX_VERSION=1.27.0 OPENSSL_VER=1.1.1w
+    - NGINX_VERSION=1.27.0 OPENSSL_VER=1.1.1w USE_PCRE2=Y
 
 services:
  - memcache
  - redis-server
 
 install:
-  - sudo apt update
-  - sudo apt install --only-upgrade ca-certificates
   - if [ "$USE_PCRE2" != "Y" ] && [ ! -f download-cache/pcre-$PCRE_VER.tar.gz ]; then wget -P download-cache/ https://downloads.sourceforge.net/project/pcre/pcre/${PCRE_VER}/pcre-${PCRE_VER}.tar.gz; fi
   - if [ "$USE_PCRE2" = "Y" ] && [ ! -f download-cache/pcre2-$PCRE2_VER.tar.gz ]; then wget -P download-cache https://downloads.sourceforge.net/project/pcre/pcre2/${PCRE2_VER}/pcre2-${PCRE2_VER}.tar.gz; fi
   - if [ ! -f download-cache/openssl-$OPENSSL_VER.tar.gz ]; then wget -P download-cache https://www.openssl.org/source/openssl-$OPENSSL_VER.tar.gz || wget -P download-cache https://www.openssl.org/source/old/${OPENSSL_VER//[a-z]/}/openssl-$OPENSSL_VER.tar.gz; fi
   - git clone https://github.com/openresty/openresty-devel-utils.git
   - git clone https://github.com/openresty/lua-cjson.git
-  - git clone https://github.com/openresty/openresty.git ../openresty
+  - git clone -b bump-1.27.0 https://github.com/xiaocang/openresty.git ../openresty
   - git clone https://github.com/openresty/no-pool-nginx.git ../no-pool-nginx
   - git clone https://github.com/simpl/ngx_devel_kit.git ../ndk-nginx-module
   - git clone https://github.com/openresty/mockeagain.git